Type-whiting machine



G. G. GOING.

TYPE WRIHNG MACHINE.

APPLlCATlON FILED JUNE 1. Mn].

1,326,657. Patented Dec. 30,1919. a 2 SHEETS-SHEET u.

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I TY PE WBIHNG MACHINE. APPLICATION HLED JUNE 1 PM? WVEA/TUR G. G. G (m 8 Y M fuma A TI'OR/VEYS UNITED STATES Parana? OFFIGE.

GEORGE GOULDGOING, or MIDDLETOWN, ooivivno'ricu'r, nsslenoa are THE norsnrinss TYPEWRITER COMPANY, or MIDDLETOWN, oonnnorrou'r, A. QORI'ORATION or CONNECTICUT.

rvrnwmrme Mnomnn.

Application filed June 1,

chines, and more particularly to improvements in case-shifting mechanisms thereof employed to alter the relation between the type bars and the platen.

One of the objects of the invention is to provide simple and efficient means of the character mentioned capable of easy opera-- tion to effect accurate positioning of the shiftable part.

Other objects" will be in part obvious and in part noted hereinafter in connection with the following description of the-accompanying drawing, which illustrates a typical embodiment of thein'vention, and in which-, melf gure 1 is a fragmentary plan view showingthe improved case-shifting mechanism; a

Fig. 2 is a sectional side view when the parts are in one posi.tion; and

Figs. 3v and l are fragmentary side views showing the movable parts in opposite extreme positions.

The invention as illustrated is designed for incorporation in a noiseless typewriter, but is adapted for application to various styles of machines. The moving parts of the mechanisn'i shown are mounted upon a typewriter frame comprising side walls 1,

a rear cross piece 2 and a front cross'piece 3. Above the machine and at the rear there-, of is arranged a traveling carriage mounted for letter-space and vertical case-shifting movement upon a carriagerail 4 (Fig. 2). The letter-space movement ofthe carriage is governed by suitableescapement mechanism of any of the well-known types. The carriage rail 4 extends transversely and is supported adjacent its ends by .a pair ofvertical shift -rods 5 trunnioned at their lower ends in parallel arms 6 fixed to rotate with a transverse rock shaft 7,.-in turn trun- I binn d-between the r g d' ida walls of t e Specificationof Letters Patent. i

the other extrenjie position.

Patented Dec. so, 191a. 191?; Serial No. 172,172.

I machine The upper buds of the shift rods 5 are also suitably connected with a part of the machine in such a manner that rocking movement of the arms 6 effects vertical movement of the carriage rail 1, preferably, however, without longitudinal displacement of the latter; that is, the construction is designed to effect vertical case-shifting from an intermediate to an upper or lower limit in a single vertical plane. The construction referred to may be such as that shown in Patent No. 1,155,634, issued October 5 1915 to N. H. Knderson.

Coiled counter-balancing springs 8 are preferably positioned about the rock shaft 7 to react between the latter and a stationary part, such as the cross piece 2, and are provided with tension adjusting means by which the force of the springs is utilized to counterbalance the weight of the carriage parts and normally to urge the carriage to medial position. Case-shifting movement of the carriage rail 4: is imparted by a force 'applied directly to a lateral stud 10 fixed suitably, and preferably adjustably, on the left vertical shift rod 5. To reduce friction,the stud 10 may be provided'with a terminalroller 11 which works in a cam path 12 of arocking lever plate 13. The plate 13 is also provided with a depending arm 11 by which the plate is pivoted to stationary lugs on the cross piece 2. The cam slot 12 is designed, in the configuration shown, to provide a central dwell. 15, a terminal dwell 16 and a terminal dwell 17 at the opposite end. The/dwells mentioned are connected by inclined cam walls so that,

as the lever plate 1321s rocked about its axis from one extreme position to the other, the stud 10 is raised or lowered from one extreme position, through intern'iediatc, to

In each position n'ientfioned, however, the stud roller 11 rests in a dwell of the cam slot whereby the carriage rail accurately held against vibration-and whereby the gravity or spring tendency ofqthe carriage to return from either extreme position maybe easily re sisted by the stable relationship betwecii the rocker plate 13 and the stud 10. From the foregoing description it will be under stoo d, of course, that vertical movement of stud 10 carries the shift rods 5 correspond ngly, and thereby elevates or lowers the carriage rail and its supported parts to bring the platenin coact-ive relation with the. desired type set. i

For rocking actuation of the cam plate 13 there are provided shift key levers l8 and 19 terminating at their forward ends, respectively. in a figure key 20 and a capital key 21. The lever 18 is medially pivoted on a stud .22 fixed to the left side wall 1 of the machine. frame. and thence extends down ward and rearward to terminate, in an offset stud positioned to coact with the front lower edge 24: of the cam plate 13. The lever '19 is medially fixed to a rock shaft trunnioned between the side walls 1 of the machine frame. and from thence extends rearward to terminate in an offset lug 26 positioned to coact with the lower rear edge 27 of the ram plate 13. The levers 18 and are normally urged to intermediate position. and may be conveniently so urged by single coil spring' 28 extended between a lug 2}.) on lever 18 and an aperture 30 on lever 1%).

The parts described, by their construction and arrangement, cooperatively function as follows: Depression of the figure key raises the stud so that the latter wipes over the edge of cam plate 13 and rocks the latter rearward, whereby the cam slot-12 carries stud IOdownward and thus depresses the carriage and platen to the lowermostposition in which the predetermined of type may operate to effect printing. Real-ward movement of the cam plate 13 during the operation described is permitted with respect to the stud 26 on the lever 15!, due to the cut-away edge of the cam plate. The lower Jase shift position of the parts is as shown in Fig. i.

Similarly. depression of the capital key 21 froin the intcrnu-diate position of Fig. 2 causes stud so to ride over cam edge 27 of plate 13 and rock the latter forwardly, whereby the am slot 12 effects elevation of stud it) and the carriage movable therewith. Such forward movement of the plate 13 is permitted with respect to stud 23 on lever 1.8 by reason of the cut-away edge 31 of the plate.

Release of the shift key when the carriage is. in an extreme position pern'iits counter-balancin springs 8 to exert their force through the carriage support to effect its automatic and immediate return to intermediate position. For convenience in operation there also preferably provided an additional capital key lever .15) arranged on the opposite side of the machine and fixed to the rock shaft 25, so that cap tal case are shifted.

As many changes could be made in the above construction and many apparently widely different embodiments of this invention could be made without departing from the scope thereof. it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the language used in the following claims is intended to cover all of the generic and specific features of the invention herein described and all statements of the scope of the invention, which, as a matter of language, might be said to fall tberebetween.

Having described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a tv ewritim machine. in combination, a shiftable part having three case positions. a pair of shift key levers therefor selectively operable to move said part from intermediate position to an extreme position, and an operative connection between said levers and said part including a united member having a cam slot within which said part works and haviugportions eooperable with said levers to limit actuating movement of the latter.

In a typewriting machine. in combination, a vertically shiftable carriage having opposite extreme and intermediate ease positions. shifting means therefor including a rocking member having: a cam to control movement of said carriage. and shift key levers normally out of contact with but selectively movable to engage said member on opposite sides of the axis of the latter.

in testimony whereof I aiiix my signature. in the presence of two witnesses.

GEORGE GOULD GOING.

.Jao. A. RUFFIN,

Emma K. ALLEN. 

